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Effects of disinfecting solutions on tonometer tips
1Pennsylvania College of Optometry, Philadelphia.
Summary
Isopropyl alcohol damages Goldmann applanation tonometer tips, while other disinfectants like hydrogen peroxide and bleach are safe. This study assessed tonometer tip structural integrity after simulated yearly use.
Area of Science:
- Ophthalmology
- Biomaterials Science
Background:
- Goldmann applanation tonometry is crucial for glaucoma diagnosis.
- Disinfection of tonometer tips is essential for patient safety.
- The long-term effects of disinfectants on tonometer tip integrity are not fully understood.
Purpose of the Study:
- To evaluate the structural integrity of Goldmann applanation tonometer tips after exposure to common disinfecting solutions.
- To determine the safety of specific disinfectants for routine tonometer tip maintenance.
Main Methods:
- Haag-Streit tonometer tips were immersed in hydrogen peroxide, isopropyl alcohol, sodium hypochlorite, glutaraldehyde-phenate, and distilled water for 30 days (simulating 1 year of use).
- Tips were regularly examined using slitlamp microscopy, measured with vernier calipers, and photographed to detect structural degradation.
Main Results:
- Isopropyl alcohol caused significant structural damage to the tonometer tips.
- Hydrogen peroxide, sodium hypochlorite, and glutaraldehyde-phenate did not cause discernible structural degradation.
- Distilled water served as a control and showed no damage.
Conclusions:
- Isopropyl alcohol should be avoided for disinfecting Goldmann applanation tonometer tips.
- Hydrogen peroxide, sodium hypochlorite, and glutaraldehyde-phenate are safe for disinfecting tonometer tips after prolonged simulated use.
- Standardized disinfection protocols are vital for maintaining ophthalmic instrument integrity.